when the amplitude of a pendulum decreases

when the amplitude of a pendulum decreases to half its initial value, the period will have: a. Halved b. doubled c. Remain the same

a steel cable spanning

a steel cable spanning a river is m long when the temperature is 20 degrees C. what will be its length when the temperature drops to ) degrees C. ( the coefficent of thermal expansion of steel is 12*10^-6 1/c) is the answer a.200m. b. 195m c. 195.997 m d. 195.903m

consider a flat steel plate

consider a flat steel plate with a hole through its center. when the plates temperature is decreased, the whole will a. expand b. expand if it takes up less than half the plates surface area c. contract only if it takes up more than half the plates surface area d. contract

both the pressure and volume

both the pressure and volume of a given sample of an ideal gas double. this means that its temperature in kelvins must. a. quadruple b. reduce to one fourth its original value c. reduce to one half its original value d. remain unchanged. e. double

the weight that will cause a wire

the weight that will cause a wire of diameter d to stretch a given distance, for a fixed length of wire, is a. proportional to d^2 b. independant of d c. proportional to d d. independant of what the lengthof wire is

by how much will a slab of concrete

by how much will a slab of concrete 18m long contract when the temperature drops from 24 degrees C to -16 degrees C. ( the coefficent of linear thermal expansion for concrete is 12*10^-6 per degree C.) a. 0.86 cm b. 0.52 cm c. 8.6 cm d. 0.17 cm

how much heat is added

how much heat is added to 500g of water to raise its temperature from 15 degrees C to 85 degrees C? a. 35 j b. 1.5 * 10^8j c. 1.5 * 10^5j d. 3.5 * 10^4j

physics of a baseball

an object in motion stays in motion untill it comes into contact with a opposite greater or equal force

a convex lens is placed

a convex lens is placed on a flat glass plate and illuminataed from above with monochromatic red light. when viewed from above, concentric bands of red and dark are observed. what does one observe at the exact center of the lens where the lens and the glass plate are in direct contact? a. a bright spot that is some color othe ...continues

consider two diffraction gratings

consider two diffraction gratings with the same slit speration, the only difference being that one grating has 3 slits and the other 4 slits. if both gratings are illuminated with a beam of the same monochromatic light, a. the grating with 4 slits produces the greater seperation between orders b. both gratings produce the sa ...continues